TAT 4 weeks CPT Code 81405 Test Code 2121 Test Methods Sequencing Deletion/Duplication analysis Specimen Types Accepted Blood Saliva Cultured Cells Extracted DNA Documents General Test Requisition Form Genes DGUOK FTH1 FTL HAMP HFE HJV (A.K.A. HFE2) PPM1F SLC40A1 TFR2 TTC37